(19)
(11) EP 1 020 292 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
30.05.2001 Bulletin 2001/22

(43) Date of publication A2:
19.07.2000 Bulletin 2000/29

(21) Application number: 00300161.7

(22) Date of filing: 11.01.2000
(51) International Patent Classification (IPC)7: B41J 2/14, B41J 2/16
(84) Designated Contracting States:
DE FR GB
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 12.01.1999 JP 481799
30.11.1999 JP 34017899

(71) Applicant: SEIKO EPSON CORPORATION
Shinjuku-ku Tokyo-to (JP)

(72) Inventors:
  • Usui, Minoru
    Suwa-shi, Nagano-Ken (JP)
  • Takahashi, Tomoaki
    Suwa-shi, Nagano-Ken (JP)
  • Kitahara, Tsuyoshi
    Suwa-shi, Nagano-Ken (JP)

(74) Representative: Charlton, Peter John et al
Elkington and Fife, Prospect House, 8 Pembroke Road
Sevenoaks, Kent TN13 1XR
Sevenoaks, Kent TN13 1XR (GB)

   


(54) Ink jet recording head


(57) An ink jet recording head has an ink passage unit (1) formed by superposing a nozzle plate (3) with a plurality of nozzles (2); an ink passage plate (8) having a first and a second surfaces (8a, 8b), provided with a plurality of pressure producing chambers (5) connected to the plurality of nozzles (2), and an ink reservoir (7) communicating with the pressure, producing chambers (5) by means of ink inlet ports (6); and a cover plate (11) closely joined to the first surface (8a) of the ink passage plate (8). The cover plate (11) are deformed elastically by piezoelectric vibrators (10) to apply pressure to the ink contained in the pressure producing chambers (5). The ink passage plate (8) is a metal sheet (21) having the first and second surfaces (8a, 8b) of the ink passage plate (8). A through hole (20) for the ink reservoir (7) is formed from the first surface to the second surface in the metal sheet (21). A plurality of recesses (27) for forming the pressure producing chambers (5) are formed in the first surface of the metal sheet by press working.






Search report